function showPic (whichpic) {
  if (document.getElementById) {
    document.getElementById('placeholder').src = whichpic.href;
    var image = new Image();
    image.src = whichpic.href;
    if (image.width < 720) {
      document.getElementById('placeholder').width = image.width;
      document.getElementById('placeholder').height = image.height;
    } else if (image.width > 720) {
      var scaleFactor = (image.width / 720);
      var scaledWidth = (image.width / scaleFactor);
      var scaledHeight = (image.height / scaleFactor);
      document.getElementById('placeholder').width = scaledWidth;
      document.getElementById('placeholder').height = scaledHeight;
    }
    if (whichpic.title) {
      document.getElementById('desc').childNodes[0].nodeValue = whichpic.title;
    } else {
      document.getElementById('desc').childNodes[0].nodeValue = whichpic.childNodes[0].nodeValue;
    }
    return false;
  } else {
    return true;
  }
}
function showMenu (whichmenu) {
  if (document.getElementById) {
    var txt = "<ul><li><a onclick='return showPic(this)' href='jpgs/3pins2001web.jpg' title='Three pins'>Three pins available for purchase</a></li></ul>";
    document.getElementById('gallerythumbs').innerHTML = txt;
    return false;
  }
}